04 May 2015, 09:32 PM ET
The century-old outburst from a classical nova is still going strong and surprising astronomers with its steady temperature.
04 May 2015, 04:42 PM ET
Mice zapped with cosmic rays can incur brain damage, suggesting that astronauts' mental performance could suffer over time on deep-space missions to Mars and beyond, researchers say.
04 May 2015, 03:55 PM ET
NASA has successfully tested electromagnetic propulsion in a hard vacuum for the first time.
04 May 2015, 03:50 PM ET
The Space Exploration, Development, and Settlement Act of 2015, drafted by Rep. Dana Rohrabacher (R-Calif.), would mark the second time in the last three decades that Congress has directed NASA to support efforts for human settlements beyond Earth orbit.
04 May 2015, 03:29 PM ET
Sparks flew on Capitol Hill where a NASA authorization bill that recommends deep cuts for Earth science made it out of a sharply divided committee on a party line vote.
04 May 2015, 03:24 PM ET
Dragon is scheduled to lift off at 7 a.m. EDT Wednesday from Florida's Cape Canaveral Air Force Station to see how the capsule performs in the event of a problem during launch. You can watch the unmanned test live here on Space.com.
04 May 2015, 02:00 PM ET
'Star Trek' actress Grace Lee Whitney — who played Janice Rand, yeoman to Captain Kirk — has died at age 85.
04 May 2015, 12:47 PM ET
An awesome WIRED video smashes a giant LEGO Super Star Destroyer to bits in a slow-motion video, and actor Tim Russ of Star Trek: Voyager explains 'Star Wars' for May the Fourth.
04 May 2015, 10:46 AM ET
Space: the final frontier — for coffee. Italian astronaut Samantha Cristoforetti, dressed in a 'Star Trek' captain's uniform, became the first person in space to sip from a freshly-brewed cup of coffee, using the ISS's new espresso machine.
04 May 2015, 10:28 AM ET
NASA's Solar Dynamics Observatory (SDO) captured the evolution of the so called ‘Phoenix Prominence’ over a 6 hour period on April 21st, 2015 in several extreme ultraviolet wavelengths.
04 May 2015, 09:51 AM ET
Astrophotographer John Chumack (galacticimages.com) captured 2 hours and 40 minutes of northern lights images in March 2015, and time-lapsed them into 3 minutes of geomagnetic amazement.
04 May 2015, 09:44 AM ET
When Charles Limoli and colleagues exposed mice to a single beam of extremely concentrated radiation, the rodents’ brain cells’ dendrite became damaged.
04 May 2015, 07:13 AM ET
Ropes of hot material that twist and writhe on the surface of the sun appear in unprecedented detail thanks to new observations.
04 May 2015, 07:00 AM ET
Two ringlike structures of stars wrapping around the Milky Way's outer disk now appear to belong to the disk itself. The results show that the disk is actually rippled and about 60 percent larger than previously thought.
04 May 2015, 07:00 AM ET
At a panel discussion Thursday (April 30) at New York's Intrepid Sea, Air & Space Museum, scientists discussed how much Hubble has allowed humans to see, and the possibilities for the telescopes' successor, scheduled to launch in 2018.
03 May 2015, 10:31 AM ET
A Russian cargo vessel suffered a serious malfunction on its way to the space station, NASA's MESSENGER probe slammed into Mercury and the New Horizons spacecraft snapped the best-ever photos of Pluto. Here's a look at Space.com's top stories of the week.
02 May 2015, 02:21 PM ET
From a spacecraft spinning out of control to predicting a cosmic demise, don't miss these amazing space images of the week for May 3, 2015.
01 May 2015, 03:56 PM ET
Since splashing down after a history-making test flight in 2014, NASA's first Orion space capsule has been, for the most part, out of sight. Now, an auction benefiting students is offering the chance to go behind-the-scenes and see the Orion spacecraft up
01 May 2015, 03:07 PM ET
The private spaceflight company SpaceX will launch a pad abort test on May 6, 2015 to test the launch escape system on its manned Dragon spaceship. See the mission in photos here.
01 May 2015, 12:00 PM ET
The U.S. Air Force will test an innovative spacecraft thruster this month when it launches the latest mystery mission of its robotic X-37B space plane. Liftoff is set for May 20, 2015.
01 May 2015, 11:00 AM ET
The Russian Progress 59M cargo ship that launched on April 28, 2015, ran into trouble right away.
01 May 2015, 09:31 AM ET
The Large Binocular Telescope Observatory snapped imagery of an occultation of Jupiter Moon's Io by its sister Jovian moon Europa. The bright spots on Io are its massive lava lakes.
01 May 2015, 06:27 AM ET
Rare loner galaxies millions of light-years away from any neighbors may be runaways from violent, disruptive relationships with other galaxies, researchers say.
01 May 2015, 06:19 AM ET
The newfound exoplanets, known as HD 7924c and HD 7924d, are "super Earths" with masses 7.9 and 6.4 times greater than that of Earth, researchers said. They orbit the star HD 7924, which lies just 54 light-years from the sun.
01 May 2015, 06:11 AM ET
Just hours before NASA's MESSENGER spacecraft crashed into the surface of Mercury, the winners of a contest to name five new craters on the rocky planet were announced.
01 May 2015, 06:00 AM ET
Johann-Dietrich Wörner expressed his enthusiasm for a moon colony at the Space Foundation's National Space Symposium, a gathering of global, commercial, civil, military and "new space" experts that was held here from April 13 to April 16.
30 April 2015, 06:00 PM ET
Clumps of small, glassy particles may be responsible for the formation of giant asteroids and the planetary 'embryos' that collided to form rocky planets like Earth, a new study suggests.
30 April 2015, 04:35 PM ET
NASA's MESSENGER probe crashed at 3:26 p.m. EDT Thursday (April 30), gouging a new crater into Mercury's surface. This violent end was inevitable for MESSENGER, which had been orbiting Mercury since March 2011 and had run out of fuel.
30 April 2015, 02:30 PM ET
NASA has selected Draper Laboratory to develop a wearable device that will track astronauts' movements around the International Space Station (ISS).
30 April 2015, 10:33 AM ET
The private space company's new vehicle reached an altitude of 307,000 feet and safely parachuted back to Earth on April 29th, 2015. This ground tracking camera view follows the vehicle from launch to touchdown.
30 April 2015, 10:33 AM ET
The private spaceflight company Blue Origin launched a surprise test of its suborbital New Shepard spaceship on Wednesday (April 29) , a flight that successfully demonstrated the space capsule but failed to recover its reusable rocket booster.
30 April 2015, 10:20 AM ET
In its first test flight, the private space company's new vehicle reached an altitude of 307,000 feet and safely parachuted back to Earth on April 29th, 2015.